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Multiple Choice
An equilibrium mixture of CO, O2, and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0020 M O2. At this temperature, Kc equals 1.4 × 10^2 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g). What is the equilibrium concentration of CO?
A
0.0050 M
B
0.0100 M
C
0.0025 M
D
0.0200 M
Verified step by step guidance
1
Write the balanced chemical equation for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g).
Express the equilibrium constant expression (Kc) for the reaction: Kc = ([CO2]^2) / ([CO]^2 * [O2]).
Substitute the known values into the Kc expression: Kc = 1.4 × 10^2, [CO2] = 0.0010 M, and [O2] = 0.0020 M.
Rearrange the Kc expression to solve for [CO]: [CO]^2 = ([CO2]^2) / (Kc * [O2]).
Calculate the equilibrium concentration of CO by taking the square root of the result from the previous step.